SK89695A3 - Method of production of mineral fibers-insulating web, a device for production of insulating web from mineral fibers, and mineral fibers-insulating plate - Google Patents

Abstract

A method of producing a mineral fiber-insulating web comprises the steps of firstly producing a first non-woven mineral fiber-web being a loosely compacted mineral fiber web of a low area weight, such as an area weight of 50-1500 g/m2, e.g. 100-1200 g/m2, such as 200-600 g/m2, or 600-1200 g/m2. The first mineral fiber web contains mineral fibers arranged generally in the longitudinal direction of the mineral fiber web. Secondly, the first mineral fiber web is moved in the longitudinal direction of the web and folded transversely relative to the longitudinal direction and parallel with a transversal direction of the first mineral fiber web, so as to produce a second mineral fiber-web containing mineral fibers arranged generally perpendicular to the longitudinal and transversal directions. Thereupon, the folded mineral fiber web is cured for bonding the mineral fibers together so as to produce the mineral fiber-insulating web comprising a central body containing mineral fibers arranged generally perpendicular to the longitudinal direction of the mineral fiber web. The method also optionally includes longitudinally compressing and/or transversally compressing the folded mineral fiber web. The folded mineral fiber web may additionally be combined with additional mineral fiber webs or coverings for producing a composite mineral fiber web product which is cured in a single curing process.

Description

Technical field

The present invention relates generally to the technical field of production of mineral fiber insulation boards. Mineral fibers generally include fibers such as mineral wool fibers, glass fibers, and the like. More specifically, the present invention relates to novel techniques for producing mineral fiber insulating webs from which mineral fiber insulating boards are cut. The mineral fiber boards produced from the mineral fiber insulating web produced by the process of the present invention exhibit advantageous characteristics in both mechanical strength and modulus of elasticity and strength, have low weight and good thermal insulating properties.

BACKGROUND OF THE INVENTION

So far, mineral fiber webs have been produced as homogeneous webs, ie. the webs in which the mineral fibers of which the web is composed are oriented in one predominant orientation, which is mostly determined by the orientation of the production line on which the mineral fiber insulating web is produced and moved during the process of producing the mineral fiber insulating web. The product made from homogeneous mineral fiber webs exhibits characteristics which are determined by the integrity of the mineral fiber insulating web and which are predominantly determined by the bonding of the mineral fibers in the mineral fiber insulation board, made from the mineral fiber insulating web, and predominantly determined by basis weight; the mineral fiber density of the mineral fiber insulation board.

Various techniques have been invented to produce mineral fiber insulation boards, of different structure, having the advantageous characteristics of mineral fiber boards, to some extent always achieved by techniques for producing mineral fiber insulation boards in which the mineral fibers are oriented predominantly in a orientation that differs from the orientation given by the production line, see International Patent Application No. PCT / DK91 / 00383; WO92 / 10602, U.S. Pat. No. 4950355, published international application no. PCT / DK87 / 00082, international publication no. WO88 / 00265, French patent no. 938294, U.S. Pat. 3230955 and Swedish patent no. References to the above patent applications and patents and US patents are incorporated herein by reference.

From the above-mentioned published international patent application no. WO88 / 00265 is a known process for producing continuous mineral fiber webs folded transversely to the longitudinal direction of a mineral fiber web to form a wavy mineral fiber web. Depending on the origin of the mineral fiber web from which the corrugated mineral fiber web is formed, the corrugated mineral fiber web may comprise mineral fibers oriented along the corrugations or perpendicular to the corrugations.

French patent no. 938294 and U.S. Pat. No. 3230995 are known techniques for making mineral fiber board or boards composed of rod-shaped elements, which techniques are similar to the technique described in the above-mentioned International Patent Application. According to the techniques described in the aforementioned French and US patents, the board or board of mineral fiber material is cut into lengths of rod-shaped elements which are then rotated and rearranged into a composite rod-shaped mineral fiber plate structure. These well-known prior art techniques include a separate step of bonding the rod-shaped slats together with a suitable binder or foaming agent, as described in said US patent.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a new method of producing mineral fiber insulating webs from which mineral fiber insulating boards can be cut, which method allows to produce on-line mineral fiber insulating boards that are a composite structure providing different advantages compared to mineral fiber boards according to the prior art.

A particular advantage of the present invention is that the new mineral fiber insulation boards of the present invention and produced by the process of the present invention contain less mineral fibers compared to prior art mineral fiber insulation boards and consequently are cheaper than mineral fiber insulation boards according to the known of the prior art, and still exhibit advantages over the mechanical strength and heat-insulating properties of the prior art mineral fiber insulation boards.

A particular feature of the present invention relates to the fact that the new mineral fiber insulation board of the present invention and manufactured by the method of the present invention is obtainable from less mineral fibers or fewer materials compared to prior art mineral fiber insulation boards and still provides the same characteristics as a prior art mineral fiber insulating board in terms of mechanical strength and thermal insulating properties, and thus provides a lighter and more compact product - mineral fiber board - when compared to the prior art mineral fiber insulating board, which reduces transportation, storage and handling costs.

The above object, the above advantages and features, together with many other objects, advantages and features, will be apparent from the detailed description of the presently preferred embodiments of the present invention set forth below, and will be achieved by the method of the invention, comprising the following steps:

(a) manufacturing a first non-woven mineral fiber web defined by a first longitudinal direction parallel to the mineral fiber web and a second transverse direction parallel to the first mineral fiber web, wherein the first mineral fiber web comprises mineral fibers arranged generally in the first transverse direction and comprises the first a thermosetting binder, wherein the first mineral fiber web is a loosely compacted mineral fiber web having a basis weight, such as a basis weight of 50-1,500 g / m ² , e.g. 100-1,200 g / m ² , such as 200-600 g / m ² , or 600-1,200 g / m ² ,

b) moving the first mineral fiber web in the first longitudinal direction of the first mineral fiber web,

c) folding the first mineral fiber web across the first longitudinal direction and parallel to the second transverse direction so as to obtain a second non-woven mineral fiber web, wherein the second mineral fiber web comprises a central body comprising mineral fibers arranged generally perpendicular to the first longitudinal direction the direction and the second transverse direction,

d) movement of the second mineral fiber web in the first longitudinal direction,

e) introducing a second mineral fiber web into a curing oven for curing the first curing agent, causing the mineral fibers of the second mineral fiber web to bind together to form a mineral fiber insulating web.

In accordance with the technique described in the above-mentioned published international patent application no. PCT / DK91 / 00383, published under WO92 / 10602, the first and second non-woven mineral fiber webs are preferably subjected to compaction and compression to provide more compact and homogeneous mineral fiber webs. The compaction and compression can be either a height compression, a longitudinal compression, a transverse compression, and a combination thereof. The method of the present invention preferably further comprises the further step of height compressing the first non-woven mineral fiber web produced in step a) and preferably made from a basic non-woven mineral fiber web as described above.

Further, the method of the present invention may advantageously comprise a further longitudinal compression step of the first non-woven mineral fiber web produced in step a) and further or alternatively an additional longitudinal compression step of the second nonwoven mineral web produced in step c). In performing the longitudinal compression, the mineral fiber web is subjected to the longitudinal compression more homogeneously, resulting in an overall improvement in the mechanical resistance and in most cases the thermal insulation properties of the longitudinally compressed mineral fiber web compared to the longitudinally uncompressed mineral fiber web.

As will be apparent from the preferred embodiments of the present invention set forth below, the mineral fiber insulation boards produced in accordance with the method of the present invention exhibit surprisingly improved mechanical properties and mechanical strength when the second non-woven mineral fiber web produced in step c) is subjected to transverse compression, by which the mineral fiber structure of the second non-woven mineral fiber web is homogenized. Lateral compression of the second non-woven mineral fiber web results in a significant improvement in the mechanical properties and strengths of the final mineral fiber insulating boards made of the second non-woven mineral fiber web and is believed to originate in the mechanical mineral fiber reposition of the second non-woven mineral fiber web. wherein the second non-woven mineral fiber web is subjected to transverse compression in which the mineral fibers of the second non-woven mineral fiber web are uniformly distributed throughout the unhardened mineral fiber web.

According to a preferred embodiment of the method according to the present invention, the folding step c) preferably comprises a step of producing corrugations extending perpendicular to the first longitudinal direction and parallel to the second transverse direction. Since the compacted low density basis mineral fiber web is comprised in accordance with the teachings of the invention, the fibers of the second mineral fiber web are generally generally perpendicular to the first longitudinal direction and the second transverse direction, resulting in low compaction and low basis weight of the second mineral fiber web. made of a first mineral fiber web in the folding of the first mineral fiber web to the second mineral fiber web, which is to a greater extent comprised of individual segments arranged parallel to the next and perpendicular to the first longitudinal direction and the second transverse direction than The mineral fiber webs separate the segments from each other, eliminating any substantial range of any transition elements by interconnecting two adjacent segments of the second mineral fiber web where these transition segments could extending parallel to the first longitudinal direction and the second transverse direction and consequently free of mineral fibers arranged generally in the predominant orientation of the second mineral fiber web.

According to a further preferred embodiment of the invention, the method further comprises the following steps replacing step e):

(f) producing a third non-woven mineral fiber web defining a third direction parallel to the third mineral fiber web, wherein the third mineral fiber web is made to comprise mineral fibers generally arranged in a third direction and comprises a second curable binder agent and a third mineral fiber web is a mineral fiber web of higher compactness compared to the second mineral fiber web,

(g) attaching a third mineral fiber web to a second mineral fiber web in their face contact to produce a fourth composite mineral fiber web; and

h) introducing a fourth composite mineral fiber web into a curing oven for curing the first and second curable binder agents by binding the mineral fibers of the fourth composite mineral fiber web to form a mineral fiber insulating web.

The third non-woven mineral fiber web that is attached to the second mineral fiber web in step g) may form a separate mineral fiber web. Thus, the first and third mineral fiber webs can be produced on separate production lines which are joined together in step g).

In accordance with another embodiment of the method of the present invention, a third non-woven mineral fiber web is produced by separating the surface layer segment of the first mineral fiber web and compacting the surface layer segment for producing the third mineral fiber web.

The third mineral fiber web may further be made by densifying the surface layer segment comprising the steps of folding the surface layer segment to produce a third mineral fiber web comprising mineral fibers arranged predominantly oriented transversely to the longitudinal direction of the third mineral fiber web.

in accordance with another embodiment of the method of the present invention, the third non-woven mineral fiber web is produced by separating the surface segment of the first mineral fiber web layer and compacting the surface segment of the layer for producing the third mineral fiber web.

The third mineral fiber web may further be made by densifying the surface segment of the layer so as to obtain a third mineral fiber web comprising mineral fibers arranged generally transversely with respect to the longitudinal direction of the third mineral fiber web.

The process of the present invention further preferably comprises a further step similar to step j) for producing a fifth non-woven mineral fiber web similar to a third mineral fiber web and a bonding step in step g) of the fifth mineral fiber web to a second mineral fiber web in face contact thereto. and so that the second mineral fiber web is interposed between the third and fifth mineral fiber webs in the fourth mineral fiber web. In the production of the fifth non-woven mineral fiber web, an integral composite mineral fiber structure of the fourth mineral fiber web having a structure is obtained wherein a central body derived from the second mineral fiber web is interposed between opposed densified surface layers formed of third and fifth mineral fiber webs. fibers.

Preferably, the method of folding the first mineral fiber web is such that a continuous undulating pattern extends in the first longitudinal direction of the first mineral fiber web to produce a precisely structured, folded second mineral fiber web from which the surface layer (s) are readily separated. ).

If the third mineral fiber web is provided as surface layers separate from the second mineral fiber web, as mentioned above, the mineral fibers of the third mineral fiber web are generally oriented along the first longitudinal direction. As a result, the third direction may coincide with the first longitudinal direction.

If the third non-woven mineral fiber web is produced on a separate production line, the third direction may be of any orientation, e.g. be coincident with the first longitudinal direction and consequently be perpendicular to the second transverse direction, or alternatively be coincident with the second transverse direction and consequently be perpendicular to the first longitudinal direction.

In accordance with a preferred embodiment of the method of the present invention, the method further comprises the following steps before the step

c):

(i) the production of a sixth non-woven mineral fiber web defining a fourth longitudinal direction parallel to the sixth mineral fiber web, wherein the sixth mineral fiber web comprises mineral fibers and comprises a third curable binder, and the sixth mineral fiber web is a higher fiber mineral web densities compared to the first mineral fiber web; and

j) attaching a sixth mineral fiber web to the first mineral fiber web produced in step a) in face contact with it, prior to step c), to produce a seventh composite mineral fiber web comprised in step c) for producing a second nonwoven a mineral fiber web and step e) also comprising curing a third curable binder agent.

According to an embodiment of the process of the present invention as defined above, an integral composite product is produced by attaching a sixth mineral fiber web to a first mineral fiber web that is attached to the first mineral fiber web prior to processing the seventh mineral fiber composite web in step d) to form a second a mineral fiber web according to the present invention.

The sixth non-woven mineral fiber web that is joined to the first mineral fiber web in step j) may form a separate mineral fiber web. Thus, the first and sixth mineral fiber webs can be produced on separate production lines that are joined together in step j).

According to another embodiment of the method of the present invention, the sixth non-woven mineral fiber web is produced by separating a separate layer of the first mineral fiber web and compacting a separate layer for producing the sixth mineral fiber web.

The sixth non-woven mineral fiber web may be made by separating a separate layer from the first mineral fiber web and may be made as a surface layer or side layer segment. Further, the surface layer may, if the separate layer from which the sixth mineral fiber web is produced is provided as the surface layer of the first mineral fiber web, be produced as an upper or lower surface layer separated from the mineral fiber web from which the separate layer is separated .

The compaction of the separate layer from which the sixth mineral fiber web is produced may, according to another embodiment of the method of the invention, comprise the step of folding the separate layer.

The method of the present invention may further advantageously comprise the step of applying a coating to the surface or both sides of the first mineral fiber web and / or applying the coating to the surface or both sides of the nonwoven second mineral fiber web and / or applying the coating to the surface. both sides of the surface of the fourth mineral fiber web. Further, the coating may be applied to the sixth non-woven mineral fiber web prior to step j) of attaching the sixth mineral fiber web to the first mineral fiber web to provide a composite seventh mineral fiber web comprising a coating applied to its top or bottom or interposed between the sixth and a seventh mineral fiber web of a seventh mineral fiber composite web. The coating forming the integral component of the seventh composite mineral fiber web is also folded in step c) and produces interlayer coatings in the structure of the second non-woven mineral fiber web. The coating may be a foil, a foil of plastic materials, such as a continuous foil, a woven or nonwoven web, or alternatively a foil of a non-plastic material, such as paper or fabric, or a metal wire or wire mesh. The nonwoven insulating web produced by the process of the present invention may, as discussed above, be provided with two oppositely arranged mineral fiber webs facing the central body of the composite mineral fiber insulating web. If the mineral fiber insulating web is manufactured as a three-layer assembly, one or both sides of the surface may be provided with similar or identical surface coatings.

Stage (e) of curing the first curable binder agent and optionally the second and third curable binder agents depends on the nature of the curing binder (s) and will be carried out in a number of different ways, e.g. simply exposing the curable binder or agents to a curing gas or a curing atmosphere, such as the atmosphere, by exposing the curable binder or agents to irradiation, such as UV or IR irradiation. When the curable binder or thermosetting binder such as conventional resin-based binder agents are commonly used in the mineral fiber industry, the method of curing the curable agent or agents includes the step of introducing the mineral fiber web to be cured into the curing oven. Accordingly, the curing process is carried out by means of a curing oven. Other alternative curing devices may include IR emitters, microwave emitters, and the like.

Advantageously, the board segments are cut from the cured mineral fiber insulating web produced in step g) by cutting the cured nonwoven third or fifth composite mineral fiber web into board segments in a separate production step.

The method of the present invention may further comprise the further step of compressing the fourth composite mineral fiber web before curing the fourth composite mineral fiber web. The compression of the fourth composite mineral fiber web may include height compression, longitudinal compression and / or transverse compression. It is believed that the compression of the fourth composite mineral fiber web improves the homogeneity of the end product since the compression of the fourth composite mineral fiber web produces a homogenizing effect on the central body of the fourth composite mineral fiber web, wherein the central body is formed by the central body of the second nonwoven mineral fiber web. fibers.

The above object, advantages and features, together with many other objects, advantages and features, are further obtained by an apparatus for producing a mineral fiber insulating composite web comprising:

(a) a first means for producing a first nonwoven mineral fiber web defining a first longitudinal direction parallel to the first mineral fiber web and a second transverse direction parallel to the first mineral fiber web, wherein the first mineral fiber web is made to comprise mineral fibers arranged generally in a second transverse direction and comprising a first thermosetting agent, the first mineral fiber web is not a very densified mineral fiber web of low basis weight, such as a basis weight of 50 to 1500 g / m ² e.g. 100-1,200 g / m ² , such as 200-600 g / m ² or 600-1,200 g / m ² ,

b) second means for moving the first mineral fiber web in the first longitudinal direction of the first mineral fiber web;

c) third means for folding the first mineral fiber web transversely to the first longitudinal direction and parallel to the second transverse direction to form a second non-woven mineral fiber web comprising a central body comprised of mineral fibers arranged substantially perpendicular to the first longitudinal direction and the second transverse direction .

d) fourth means for moving the second mineral fiber web in the first longitudinal direction;

(e) a fifth means for introducing a second non-woven mineral fiber web into a curing oven for curing the first curing agent so as to cause the mineral fibers of the second mineral fiber web to bind together to form an insulating mineral fiber web.

The apparatus of the present invention may advantageously include any of the above features of the method of the present invention.

The above object, the above-mentioned advantage and the above-mentioned features together with many other objects, advantages and features are additionally obtained by means of the mineral fiber insulation board according to the present invention, wherein said mineral fiber insulation board defines a longitudinal direction and comprises: a central body comprising the mineral fibers, the surface layer comprising the mineral fibers, the central body and the surface layer are interconnected in the face contact, the mineral fibers of the central body are positioned generally perpendicular to the longitudinal direction and perpendicular to the surface layer, the mineral fibers of the surface layer are located generally parallel longitudinally, the surface layer is more compact compared to the central body and the mineral fibers of the central body and the mineral fibers of the surface layer are joined together into an integral structure only by curing the binders in a single curing process and initially present in the non-cured, non-woven mineral fiber webs from which the central body and the surface layer are made.

The mineral fiber insulating board according to the present invention preferably comprises opposing surface layers of similar structure, laminating the central body to the integral structure of the mineral fiber insulating board.

According to a preferred embodiment of the mineral fiber board according to the present invention, the central body of the lamella is arranged predominantly perpendicular to the longitudinal direction and joined by mineral fiber layers of higher mineral fiber density compared to the lamellae. The higher-density mineral fiber layers may comprise mineral fibers arranged or oriented along any direction depending on the arrangement or orientation of the mineral fibers of the lamellae.

Description of the figures in the attached drawings

The present invention will now be described in more detail with reference to the drawings, in which: FIG. 1 is a schematic and perspective view illustrating a manufacturing apparatus for producing a mineral fiber insulating web according to the present invention; FIG. 2 is a schematic and perspective view illustrating a first manufacturing step of producing a mineral fiber insulating web from a mineral fiber melt, FIG. Fig. 3a is a schematic and perspective view illustrating the manufacturing step of the height compression and longitudinal compression of the mineral fiber insulating web; 3b is a schematic and perspective view illustrating a manufacturing step of transverse compaction of a height-compressed and longitudinally compressed mineral fiber insulating web produced in the manufacturing step shown in FIG. 3a; FIG. Fig. 3c is a schematic and perspective view illustrating a manufacturing step of simultaneous transverse compression, height compression and longitudinal compression of a mineral fiber insulating fiber; Fig. 4 is a schematic and perspective view illustrating a manufacturing step of curing a mineral fiber insulating web and a manufacturing step of splitting a cured mineral fiber insulating web into plate segments; 5a is a schematic, fragmentary and perspective view of a first embodiment of a mineral fiber insulation board manufactured in accordance with the technique shown in FIG. 1, FIG. 5b is a schematic, fragmentary and perspective view of a second embodiment of a mineral fiber insulation board manufactured in accordance with the technique of FIG. 1, FIG. 6 is a schematic and perspective view illustrating the initial production stage of the production of a two-layer mixed mineral fiber web of different densities produced in the manufacturing apparatus shown in FIG. 1, by the techniques of the present invention; FIG. 7 is a schematic view illustrating an alternative technique of folding a mineral fiber insulating web transversely with respect to the longitudinal direction of the mineral fiber insulating web; FIG. 8 is a schematic and perspective view illustrating a manufacturing step of separating the surface layers of a pleated mineral fiber insulating web produced by the technique shown in FIG. 5, a manufacturing step of compacting the surface layer and a manufacturing step of bonding the compacted surface layers to the remaining portion of the central core of the mineral fiber insulating web produced in accordance with the technique shown in FIG. 7, FIG. 9 is a schematic and perspective view illustrating the folding of a mineral fiber insulating web produced by the technique shown in FIG. 7, FIG. 10 is a schematic and perspective view illustrating a segment of a mineral fiber insulation board manufactured according to the technique shown in FIG. 7 and 8 and made of a pleated mineral fiber insulating web shown in FIG. 9, FIG. Fig. 11 is a schematic, fragmentary and perspective view of another embodiment of a segment of a mineral fiber plate produced by the techniques of the present invention; Figures 12 and 13 are diagrams illustrating the manufacturing parameters of an online manufacturing apparatus producing generally building insulating boards of mineral fiber insulating webs produced according to the teachings of the present invention; 14 and 15 are diagrams similar to those of FIG. 12 and 13 illustrating the manufacturing parameters of an online mineral fiber insulating roofing sheet fabricated from a mineral fiber insulating web produced according to the present invention; 16 and 17 are diagrams illustrating manufacturing parameters of an online manufacturing apparatus producing generally mineral fiber building insulation boards from a mineral fiber insulating web produced in accordance with the techniques of the present invention and subjected to transverse compression as shown in Figs. 3b, and FIG. 18 and 19 are diagrams similar to those of FIG. 16 and 17 illustrating manufacturing parameters of an online manufacturing apparatus producing mineral fiber insulating mineral fiber roof sheets from a mineral fiber insulating web produced in accordance with the teachings of the present invention and subjected to transverse compression as shown in Figs. 3b.

In FIG. 2, the first step of manufacturing a mineral fiber insulating web is described. The first step involves the formation of mineral fibers from the mineral fiber melt produced in the furnace 30 and which is supplied from the furnace outlet 32 to all four fast spinning spinner wheels 34 to which the mineral fiber melt is supplied as stream 36 melt forming a mineral fiber. The melt stream 36 forming the mineral fiber is fed to the spinning wheels 34 in a radial direction to the wheels and is simultaneously supplied to the rapidly rotating wheels 34 in an axial direction thereto a cooling gas stream which causes the formation of individual mineral fibers that are ejected or splashed from the fast-spinning spinning wheels 34 as indicated by the reference numeral 38. The mineral fiber spray 38 is collected on a continuously operating first conveyor belt 42 and forms a primary mineral fiber insulating web 50 of mineral fibers. The thermosetting binder is also added to the primary mineral fiber insulating web 50 either directly to the mineral fiber insulating web 50 or at the stage of expulsion of the mineral fibers from the spinning wheels 34, i. at the stage of formation of individual mineral fibers. The first conveyor belt 42 is, as shown in FIG. 2 clearly composed of two sections of the conveyor belt. The first section of the conveyor belt is inclined with respect to the horizontal direction and with respect to the second substantially horizontal section of the conveyor belt. The first section forms the collector section, while the second section forms the transport section.

In FIG. 3a shows a site for compacting and homogenizing the entrance of the mineral fiber insulating web 50, which site serves for the purpose of compacting and homogenizing the incoming insulating web 50 to produce an exiting insulating web 50 '' is denser and more homogeneous compared to the incoming insulating web 50 mineral fiber. The incoming insulating web 50 may comprise a primary mineral fiber insulating web 50 made at the location shown in FIG. Second

The compaction site comprises two sections. The first section comprises two conveyor belts 52 ¹¹ and 54 ¹ ', which are arranged on the upper side of the surface and the lower side of the surface of the mineral fiber web 50. The first section essentially comprises a section in which the mineral fiber web 50 entering the section is subjected to height compression causing a reduction in the overall height of the mineral fiber web and compaction of the mineral fiber web. Conveyer belts 52 '' and 54, ¹¹ are consequently arranged so that they slope from an input end at the left side of Fig. 2, wherein the inlet of the mineral fiber web 50 is in the first section, towards an outlet end from which the highly compressed mineral fiber web is delivered to the second section of the compaction site.

The second section of the compaction site comprises three sets of rollers 56 ¹ and 581, 56 *, and 58 * ^1, and 56 * ¹¹ and 58 '* *. The rollers 56 ', 56 ¹¹ and 56' ¹¹ are arranged on the upper side of the nonwoven surface, while the rollers 58 ¹ , 58 ¹¹ and 58 ¹¹¹ are arranged on the lower side of the mineral fiber web. The second section of the compaction site provides longitudinal compression of the mineral fiber web and this longitudinal compression produces homogenization of the mineral fiber web by rearranging the mineral fibers of the mineral fiber web compared to the initial structure to a more homogeneous structure. The three sets of rollers 56 ¹ and 58 ¹ , 56 ¹¹ and 58 ¹ 'and 56' ¹ 'and 58' ^{11 of the} second section rotate at the same rotational speed, but less than the rotational speed of the conveyor belts 52 ¹¹ and 54 ¹ 'of the first section, causing longitudinal compression of the mineral fiber web. The height-compressed and longitudinally compressed mineral fiber web extends from the compaction site shown in FIG. 3a, designated by the reference numeral 50 ¹¹ .

It will be appreciated that the combined height and longitudinal compaction site shown in FIG. 3a can be modified by deleting one or two sections, i. a first section forming a height compression section, or alternatively a second section forming a longitudinal compression section. When one or two sections of the compaction site shown in FIG. 3a, the compaction section performs a single compaction or compression, and becomes a site of height compression or alternatively longitudinal compression. Although the height compression section has been described as comprising conveyor belts and the longitudinal compression section has been described as comprising rollers, both sections can be converted by means of belts or rollers. Also, the height compression can be performed by rollers and the longitudinal compression section can be provided with conveyor belts.

In FIG. 3b shows the location of the transverse compression, which is denoted overall by 80. In the station 80, an input-insulating web 70 ^1, made of mineral fiber in accordance with the technique described below with reference to FIG. 1, contacts two conveyor belts 85 and 86 which define a constriction acting on the mineral fiber insulating web to be transversely compressed and in contact with a total of four surface-rotating rollers 89a, 89b, 89c and 89d, which together with similar rollers, but not shown in the figure, opposite rollers 89a, 89b, 89c and 89d, serve to assist in transverse compression of the entire web 70. Conveyor belts 85 and 86 are disposed on rollers 81, 83 and 82, 84 .

A transversely compressed and compacted mineral fiber insulation web 70 is supplied from the transverse compression site 80. As the mineral fiber insulating web 70 'passes through the transverse compression site 80 and transforms into a transversely compressed mineral fiber insulating web 70 ¹¹ , the web is supported by rollers forming an inlet roller 87 and an outlet roller 88,

If the ^1-insulating web 70 is provided transversally compressed within the station 80 shown in FIG. 3b with an upper surface layer, such as the woven mesh film 46 ¹ described below with reference to FIG. 1, the film should have a structure that is compatible with the lateral compression of the web and film assembly. The film applied to the top side of the surface of the insulating web 70 'should be compressible and adjustable to reduce the width of the mineral fiber insulating fabric 70 ¹¹ extending from the transverse compression location 80.

In FIG. 3c shows an alternative technique of squeezing the 50 ' ¹ ' mineral fiber web. According to the technique shown in FIG. 3c, a location 60 * ¹¹ 'is used, where this location forms a joint of height compression, longitudinal compression and transverse compression. Thus, instead of ^60,111, there are a total of six roller sets, three of which are three roller sets 56 ¹ , 58 ¹ ; 56 ¹ ', 58 ¹ '; and 56 ¹ ' ¹ , 58 ¹ ' *, as described above in FIG. 3a, and constitutes an alternative to the combination of sites mentioned above with respect to FIG. 3a and 3b.

Location 60 ¹¹¹¹ shown in FIG. 3c further comprises three roller sets, the first set consisting of two rollers 152 ¹ and 154 ¹ , the second set consisting of two rollers 152 '' and 154 '', and the third set consisting of two rollers 152 ¹¹¹ and 154 ' ¹ '. The rollers 152 ^1, 152 ^11, 152 ¹¹¹ are arranged on the upper side surface of the insulating web 50 '' of the mineral fiber-like rollers 56 ', 56 * ¹ 56 and ^{1 1'.} Three rollers 154 ¹ , 154 '' and 154 ^{1 11 '} are arranged on the underside of the surface of the mineral fiber insulating web 50'', similar to rollers 58, 58 ¹ ' and 58 ''. Three roller sets 152 ', 154 ¹ ; 152 ' ¹ , 154''; and 152 ^{1 11} , 154 ^'11 serve the same purpose as the belt assemblies 52 ¹ ', 54 ¹¹ discussed above in FIG. 3a, for the purpose of height compression of the mineral fiber insulating web 50 ^l entering 60 * ^{1 1 l} .

Three sets of height compression rollers 152 ¹ , 154 '; 152 '*, 154'¹; and 152 ^{1 11} , 154 ^{1 11} are similar to the above described belt assemblies 52 ¹¹ ' ¹ operating at a rotation speed coincident with the speed of the mineral fiber insulating web 50' ¹ entering the height compression section of the site 60 ' ¹¹¹ . Three roller sets forming a longitudinal compression section, ie rollers 56 ¹ , 58 '; 56 ¹¹ ; 58 ¹¹ ; and 56 ^{1 11} , 58 ¹¹¹ , operate at a reduced rotation speed, thus determining the longitudinal compression ratio.

To induce transverse compression of the insulating web 50 ' ¹ entering the location 60 ¹¹¹ ' shown in Fig. 3c, four crankshaft sets are provided with reference numerals 160 ¹ , 160 ¹ . 160 ^{11 1} and 160 ^{1 1} ' ¹ . The shaft sets are of the same structure, and one crankshaft set 160 ' ¹ is described below, since the crankshaft assemblies 160 ¹ , 160 ¹ ' ¹ and 160 ^1.11 are identical to the 160 ¹ 'shaft assembly and contain elements identical to the elements of the set 160 ¹¹ shafts, however, designated the same reference numerals added a single, two and three symbols.

The crankshaft assembly 160 ¹¹ includes a motor 162 ¹¹ that moves the rack assembly 164 ¹¹ from which the shaft 166 ' ¹ extends. A total of six gears 168 ^{11 of the} same configuration are mounted at the shaft outlet 166 ¹ '. Each of the gears 168 ¹¹ engages a corresponding gear 190 ¹¹ . Each of the gears 190 ' ¹ constitutes a crankshaft drive arm of the crankshaft system, further comprising guide wheels 192 ¹¹ and a crankshaft arm 194 *. The crankshaft arms 194 ^{1 '} are positioned to move from a lowered position to an elevated position between two attached rollers on the lower right side of the mineral fiber insulating web 50' ¹ entering 60 ¹¹¹¹ and are adapted to cooperate with the crankshaft arms a crankshaft system 160 ^L located on the top right side of the mineral fiber insulation web 50 ¹¹ inlet 60 ¹¹¹ *.

Similarly, the crankshaft arms of the crankshaft arm system 160 ^{1 1} '' and 160 '''', located on the upper left and lower sides of the mineral fiber insulating web 50 ' ¹ at the entrance to 60 ¹ '' ¹ , are adapted for further cooperation. as described above.

As shown in Fig. 3c, the first set of arms 194 ', 194 ¹ ', 194 ¹ '', 194 ' ¹ ' ^{1 of the} crankshaft arm systems 160 ', 160 ¹ ', 160 ^{1 11} and 160 ^{1111 of the} crankshaft are located between the first and second set of rollers 152 ¹ , 154 ¹ , and 152 ¹¹ . 154 ¹ '. Similarly, a second set of crankshaft arms is located between the second and third sets of rollers 152 ¹ ', 154 ¹¹ and 152 ^{1 11} , 154' ¹¹ .

The crankshaft arms each of a total of six crankshaft arm sets are equally wide. In each of the systems 160 '. 160 ^{1 1} , 160 ^{1 1 1} and 160 ^{1 1 1} 'crankshaft arms are the first crankshaft arm widest and the width of the crankshaft decreases with each crankshaft arm system from the first crankshaft arm to the sixth crankshaft arm located behind the sixth crankshaft arm. rollers 56 ¹¹¹ , 58 ¹ ' ¹ .

With the motor assemblies 160 ^1, 160 ^11, 160 '' and ¹ 160 ^11.1 of the crankshaft, the crank arms of a specific crankshaft set are rotated in synchronism with the remaining three arms of the crank arm assembly of the crankshaft. In addition, the crankshaft arms of all six crankshaft sets operate synchronously and in synchronization with the speed of entry of the mineral fiber insulating web 50 ¹¹ to the location 60 ¹¹¹¹ . The widest or first set of crankshaft arms is adapted to begin folding the 50 ¹ 'mineral fiber insulating web, while lifting the arms 194''and 194 ^{1 1} *' of crankshaft systems 160 ' ¹ and 160''''crankshaft arms from positions below the bottom surface of the mineral fiber insulating web 50 ¹¹ and are contacted from the underside of the surface of the mineral fiber insulating web 50 '' while the crankshaft arms 194 'and 194 ¹ ' of the crankshaft arms 160 'and 160 ^{111 are} lowered from the positions above the upper side of the mineral fiber insulating web 50 ' ¹ and are contacted with the upper side of the mineral fiber insulating web 50' ¹ .

Further rotation of the output shafts 166 ', 166'', 166 * ^-1 and 166 ¹¹¹¹ applied to the crankshaft levers of the first set of crankshaft levers moved towards the center insulating web 50 ¹¹ mineral fiber, with the resulting transversal compression of a central area of the insulating mineral fiber web 50 ^{1 1} . As soon as the crankshaft arms of the first crankshaft set reach the center position, the crankshaft arms 160 ¹ and 160 ^'11 are raised, while the crankshaft arms 160 ¹ ' and 160 ¹¹ '' fall and consequently come into contact with the upper and the underside of the surface of the mineral fiber insulating web 50 ''.

As insulating web 50 ¹¹ mineral fiber is moved through the station 60 ^1, the next or second set of crankshaft levers provides an additional transversal compression of areas insulating web 50 ^one of the mineral fiber, which areas are positioned at opposite sides of the above-mentioned central area, while the third or fourth, fifth or sixth crankshaft arm sets produce an additional transverse compression of the mineral fiber insulating web to obtain a total transverse compression of the mineral fiber insulating web.

The crankshaft arm width of each crankshaft arm assembly, the gear ratios 164 ', 164' ¹ , 164 '''and164''' ¹ , the gear ratios of gear wheels 168 and 190, and the mineral fiber insulating web entry rate 50 ¹¹ into the The spots 60 ¹¹¹¹ are interconnected and further adapted to rotate speed of the height compression and longitudinal compression section for producing a 50, ^{1, 1 high-} fiber mineral fiber insulating web.

The integration of the height compression section and the longitudinal section as described above in FIG. for the work described longitudinal separate, the total size of the production equipment.

the section longitudinally into a single location, the bending compression described above in FIG. 3c, not the longitudinally cranked crankshaft systems above in FIG.

but integration

Height compression sections, longitudinal bending sections can be all three functions reduced

3c.

The primary insulating web 50 ¹¹¹ of mineral fibers produced in the station shown in Figure 2 and optionally compressed in accordance with the technique described above with reference to FIG. 3a, in accordance with a preferred embodiment of the method of the invention, is further processed at the location shown in FIG. The insulating web 50 enters the production site by means of a first conveyor belt 42, at which point the insulating web 50 is contacted with a separating tool 60 serving to divide the mineral fiber insulating web 50 into two mineral wool insulating webs 70 and 78 fibers. The mineral fiber insulating web 70 is a web of low density and low basis weight, such as a non-dense web having a basis weight of 600-1,200 g / m ² . The insulating webs 70 and 78 are conveyed from the separating tool 60 by means of a conveyor belt 62 ¹ and two conveyor belts 62 ¹¹ and 62 ¹¹¹ .

In the apparatus shown in FIG. 1, the web 78, which will be further processed as described below, is separated from the lower portion of the primary mineral fiber insulating web 50 so that the upper portion of the primary mineral fiber web contains smaller mineral fiber components because larger and heavier mineral fiber components are collected. on the lower portion of the primary mineral fiber insulating web 50 collected on the first conveyor belt 42, as shown in FIG. 1. A homogeneous broadening product may be produced from the upper portion of the primary mineral fiber insulating web 50 formed by the web 70 as compared to a similar product made from the lower portion of the primary mineral fiber insulating web 50, which portion comprises the web 78.

The mineral fiber insulating web 70 is conveyed from the conveyor belt 62 'to two opposing conveyor belts 64 ¹ and 64 ¹¹ , which serve for the purpose of laying (sandwiching) the mineral fiber insulating web 70 between opposing surfaces of the conveyor belt conveyor belts which descends from an elevated position to a lower position without any risk of overloading and inducing a low compactness and low basis weight of the mineral fiber insulating web 70. Of the sandwich conveyor belts 64 'and 64 ¹ ', the web 70 is further guided by two conveyor belts 64 ¹¹¹ and 64 ¹¹¹¹ to a second set of substantially horizontal conveyor belts from which the web 70 is fed into three sets of sandwich conveyor belts from which the belts 66 ¹ and 66 ¹¹ form a first set, the second set consist of conveyor belts 68 'and 68''and the conveyor belts 72 ¹ and 72 ¹ ' constitute a third set. The conveyor belt conveying speed of the three conveyor belt sets decreases from the first set to the third set and slows the conveying speed of the insulating web 70, causing the accumulation of the mineral fiber webs in the third conveyor belt set 72 * and 72 ' ¹ , thereby 2. The method according to claim 1, wherein the web 70 is folded across the longitudinal and transport directions of the mineral fiber insulating web 70.

Conveyor belts 68 ¹ and 68 ¹¹ forming a second set and conveyor belts 72 'and 72 ¹¹ forming a third set, each forming a set of conveyor belts in which the conveyor belts are parallel to each other and wherein the sets are further aligned in line with the other belt , such as conveyor belts 68 'and 72', and similarly, conveyor belts 68 ¹¹ and 72 ¹¹ are aligned with each other. An alternative second set comprising conveyor belts 68 'and 68' ¹ may extend from an inlet end to an outlet end of the second set, while a third set comprising conveyor belts 72 ¹ and 72 * ¹ may extend from an outlet end to an inlet end of a third set. As a result, a taper may be provided in the transition between the second set and the third set. Further, alternatively, the distance between the third set conveyor belts 72 ¹ and 72 * * at the inlet end of the third set may be less than or greater than the distance between the second set conveyor belts 68 ¹ and 68 '* at the outlet end of the second set, regardless of whether the second and / or third sets degrade or not degrade against movement between the second and third sets. Still further alternatively, the third set of conveyor belts 72 ¹ and 72 ^{11 can} operate at different speeds and provide specific surface treatment on the top and bottom of the surface of the mineral fiber insulating web interposed between the conveyor belts 72 'and 72 ¹¹ .

An insulating web of low compactness and low basis weight is comprised of a mineral fiber web 70 * in which the segments of the mineral fiber web 70 are positioned perpendicular to the longitudinal and transverse direction of the web 70 '. It will be appreciated that the predominant mineral fiber orientation of the web 70 originating from the primary mineral fiber insulating web 50 is along the longitudinal direction of the web. Accordingly, the overall orientation of the mineral fiber-insulating web 70 composed of the mineral fiber orthogonal to the longitudinal and transversal directions of the web 70 ^first

It should further be appreciated that due to the low basis weight and the compactness of the mineral fiber insulating web 70, which is folded as described above, the web 70 is torn apart into segments that are perpendicular to the longitudinal and transverse direction of the web 70 '. . Since the web 70 tears into individual segments, the single segments 28 of the pleated insulating web 70 ' comprise essentially mineral fibers oriented perpendicular to the longitudinal and transverse directions of the web 70 '. If the web 70 is torn into individual segments, the web 70 includes a "transition segments interconnecting adjacent segments of the web 70 ^1, wherein the last-mentioned segments constitute the above-described segments containing mineral fibers orientated perpendicular to the longitudinal and transversal directions of the web 70 '. The mineral fibers contained in the intermediate segments are, in contrast to the general orientation of the mineral fibers of the pleated mineral fiber insulating web 70 ^L , oriented in the same way as the mineral fibers of the mineral fiber insulating web 70, i.e. the mineral fibers. in the longitudinal direction of the web 70 and 70 ¹ .

From the third set of conveyer belts 72 'and 72 providing a ^{11-insulating} web 70' producing a mineral fiber-insulating web 70 folded of the mineral fiber-insulating web 70 enters the mineral fibers to a point 80 of transversal compression as discussed above with FIG. 3b, or alternatively enters a location similar to 60 ' ¹ ''discussed above in FIG. 3c. Folded insulating web 70 'of the mineral fiber can be before or after the transversal compression performed in the station 80 or 60 ^{1 1' 1} exposed to additional compression such as height and / or longitudinal compression in the station similar to the station discussed above with reference to FIG. 3a or 60 ' ¹¹ ' discussed above in FIG. 3c.

In Fig. 1, the roller 44 ^{1 is} marked with a dotted line and a foil 46 'e.g. a thermoplastic material or a woven or non-woven mesh material is pressed against a top surface of the insulating web 70 from the mineral fiber by means of a roller 48 ^first Alternatively, another film may be applied to the underside of the surface of the mineral fiber insulating web 70 prior to folding the mineral fiber insulating web 70 using three sets of conveyor belts 66 ¹ , 66 ''; 68 ', 68 ¹ ' and 72 ', 72 ¹ '. Alternatively, an additional or alternative film 46 ¹ 'may be applied to the underside of the surface of the folded and transversely and optionally height and / or transversely compressed insulating web 70' by the roller 48 ^{11 of the} upper conveyor belt 74 ¹ ', which will be described hereinafter. The foil 46 ¹ 'is supplied from the roll 44 ¹¹ . Still further alternatively, an additional or alternative film may be supplied to the underside of the mineral fiber insulating web 70 ¹ and sandwiched between the lower surface of the mineral fiber web 70 ¹ and the surface layer made of the mineral fiber insulating web 78 separated from the primary mineral fiber insulating web 50. as described below.

The mineral fiber insulating web 78, separated from the primary mineral fiber insulating web 50, is conveyed by a conveyor belt 62 * ¹¹ to the location designated by the reference numeral 90 as a whole, and from there the exit of the web 78 ¹ takes place. The protruding web 78 ¹ differs from the incoming web 78 in that the predominant mineral fiber orientation of the protruding web 78 ¹ is offset from the predominantly longitudinal direction of the mineral fibers of the incoming web 78 to a predominantly transverse orientation relative to the longitudinal direction of the protruding web 78 ¹ . Further, site 90 provides a more homogeneous and compact projecting web 78 ¹ compared to the incoming web 78. The shift of mineral fiber orientation and compaction and homogenization of the mineral fiber insulating web is performed at site 90 by placing the mineral fiber insulating web 78 * transversely overlapping 90 includes opposing conveyor belts, one of which is indicated in Fig. 1a by 104, where the conveyor belts sandwich the incoming mineral fiber insulating web 78 between opposing conveyor belt surfaces and are displaced through the descending conveyor belt 106. 90 also includes an inlet roller 100 and a set of rollers 102 serving to supply the incoming insulating web. 78 of mineral fibers to twisting and sandwich conveyor belts, one of which is designated 104.

I

- 30 i

From the inclined conveyor belt 106, the exiting mineral fiber insulating web 78 'is conveyed by another conveyor belt 108 to an entrance to a compaction site comprising a conveyor belt 118 ¹¹ that acts on the upper surface of the exiting mineral fiber insulating web 78 ¹ to induce compaction and elevation. pressing. The compaction site also includes a press roller acting on the upper side of the surface of the partially compacted mineral fiber insulating web. From the conveyor belt 118 ^{1 1} and the press roller 118 ¹ , the partially compacted mineral fiber insulating web enters two sets of nonwoven sandwich conveyor belts, the first set comprising two conveyor belts 110 'and 110' ¹ located on the top of the web surface and the second the set comprises two conveyor belts 112 ¹ and 112 ¹¹ located on the underside of the web surface. From two sets of conveyor belts, the mineral fiber insulating web enters the site of further compaction, comprising six sets of rollers, the first of which is denoted by 114 'and 114''.

Two sets of conveyor belts and six roller sets operate at different speeds, causing a slowing of the mineral fiber insulating web and further compaction of the web. The two sets of conveyor belts 110 ¹ , 110 ¹¹ and 112 ¹ , 112 ¹¹ together form a longitudinal compression site similar to that described in FIG. 3a, while the site comprising six sets of rollers may form a height and / or longitudinal compression site, i.e. a site of possible and further compaction compared to the longitudinal compression site, comprising two sets of conveyor belts 110 ¹ , 110 ¹¹ and 112 ', 112' ¹ . It will be appreciated that the folding of the incoming mineral fiber insulating web 78 and the densification of the exiting mineral fiber insulating web 78 'can be accomplished by reducing the conveying speed of the mineral fiber insulating web 70 of low compactness and low basis weight caused by the folding of the web. the three sets of conveyer belts producing the transversely folded insulating web 70 ^one of the mineral fiber.

The densified mineral fiber insulating web extending from the densification points comprising two sets of conveyor belts 110 ¹ , 110 ¹ 'and 112' and 112 ' ¹ and rollers 114 ¹ and 114 ^{1 1} is designated by the reference numeral 78 ^{1 1} . Density of insulating fleece

78 ^'1 of the order of 180-210 kg / m, compared with the density of the incoming web 78 of insulating mineral fiber, of the order of 80-140 kg / ^m3. This achieves a compaction factor of the order of 1: 2 - 1: 5. Insulating web 78 ^one of the mineral fibers further leads the conveyor belt 116 to the driving of belts comprising an upper conveyor belt 74 and lower conveyor / belt 76, where the point of the conveyor belts are used for the purpose of adjoining the compacted insulating web 78 ¹ the mineral fiber web in facial contact with folding and transversely and optionally height and / or longitudinally compressed mineral fiber insulation web 70 '. The mineral fiber composite insulating web produced by joining the webs 78 ^{L 1} and 74 ^{L 1} in face-to-face contact is indicated by the reference numeral 50 ¹¹ '. Apart from the central web 70 'and the compacted surface layer 78 ^1' positioned on one side of the mineral web 70 ', the composite insulating web assembly 50'^'1 the mineral fiber further preferably comprises an additional compacted surface layer similar to the layer 78'', however, arranged on the opposite a side of the surface of the mineral fiber insulating web 70 ¹ , sandwiching the web 70 ¹ between another compacted surface layer and the compacted surface layer 78 ''. The mineral fiber composite insulating web assembly 50 ^{1 11} is further processed as described in connection with FIG. 4. Prior to further processing of the mineral fiber insulating web 50 & apos ^; , the assembly is optionally subjected to compaction and compression of the composite at a location similar to that described above with respect to FIG. Third

Before further processing of the insulating web assembly 50 ¹¹¹ a mineral fiber can be applied further film to the lower side surface of the N in the compacted surface layer 78 ^{1 1,} as described above. The film applied to the underside of the surface of the densified surface layer 78 ' ¹ may be a sheet of plastic material, or alternatively, the materials described below with reference to FIG. 5b.

In FIG. 4-insulating web assembly 50 ^{1 '11} mineral fiber, which may comprise ^one insulating web 50' of the mineral fiber ¹ shown in FIG. 1, or the mineral fiber insulating fleece assembly 50 ^{1 1} shown in FIG. 8, additionally comprising a single compacted surface layer, is moved through a curing point including a curing oven or curing oven comprising opposing curing sections 92 and 94. generating heat to heat the mineral fiber insulating web 50 ' ¹¹¹ to an elevated temperature such that the heat-curable binder of the mineral fiber web insulating web is cured to and the mineral fibers of the central core or assembly body are bonded together and a mineral fiber compacted surface layer to form an integral mineral fiber insulating web, which is cut into plate segments using a knife 96. In FIG. 4, there is shown one plate segment 10 'comprising a central core 12 ¹ and an upper layer 14 ¹ .

In FIG. 5a, a fragmentary and perspective view of a first embodiment of the insulation assembly 10 of the mineral fiber insulating web produced from the assembly 50 ¹¹ * mineral fiber shown in FIG. The mineral fiber insulating plate assembly 10 comprises a central core or body 12 made of a pleated mineral fiber insulating web 70 ¹ and a surface layer 14 made of a compacted surface layer 78 ''. The reference numeral 16 denotes a single segment of the central core or body 12, which segment consists of a single pleated mineral fiber insulating web of low density and low basis weight and which in most cases is separated from adjacent segments when the mineral fiber insulating web 70 breaks into individual discrete fleece folding segments as shown in FIG. Due to the low density and low basis weight of the mineral fiber insulating web 70, the individual segments of the central core or body 12 are very thin compared to the general dimensions of the segments 10 of the mineral fiber insulation board, providing a central core or body 12 in which the mineral the high-grade fibers oriented intentionally in a direction perpendicular to the longitudinal and transverse directions of the plate segment 10 and consequently perpendicular to the surface layer 14.

In FIG. 5b is a fragmentary and perspective view of a second embodiment of the insulating plate assembly 10. Similar to the first embodiment described above with respect to FIG. 5a, the second embodiment comprises a central core 12, an upper layer 14 and a lower layer 16. In addition, it is provided with an upper surface coating 18 which may consist of a web of plastic material, woven or nonwoven plastic film, or alternatively the coating may be formed of non-plastic materials. such as paper material solely for design and architectural purposes. Alternatively, the topsheet 18 may be applied to the mineral fiber insulating web after curing of the thermosetting binder agent, i. upon exposure of the mineral fiber insulating web 90 to the heat generated by the dryer sections 92 and 94 as shown in FIG. 4th

In FIG. 6 shows a further processing site in which the mineral fiber web 70 'is also shown in FIG. 3b, conveyed along the conveyor belt 353 to a compartment where the separating assembly 354 comprising the movable cutting belt 356 divides the mineral fiber web into two or more of the mineral fiber webs designated by 358 and 360. Part 360 moves through in a set of sandwich conveyor belts comprising a first set 362 and 364 and a second set 366 and 368 to a collection conveyor belt 370. The first and second sets of conveyor belts 362, 364 and 366, 368 can produce compaction and homogenization of the mineral fiber web 360, as described above. The mineral fiber web 358 also enters two sandwich conveyor belts 372 and 374 and further to a compaction and homogenization site 376, similar to that described above with respect to FIG. 3a for producing a densified mineral fiber web 378 that is conveyed from the densification site 376 to the mineral fiber web conveyed along the conveyor belt 370 by means of a further conveyor belt 380. By means of the conveyor belt 380 a homogenized mineral fiber web 378 is placed on top of the web. a mineral fiber web, derived from a mineral fiber web 360, and optionally partially compacted and homogenized as above, to form a composite mineral fiber web 382 comprising a highly compacted topsheet and a slightly less compacted backsheet. The topsheet and backsheet may be adhered to each other by heat-curable or curable binder agents originally present in the mineral fiber web 50 or alternatively by a heat-curable or curable binder consisting of an adhesive that is applied to the top and / or bottom contact before the step the top and bottom layers therebetween to form a composite mineral fiber web 382. In FIG. 6, the separation assembly 354 may be moved from the position shown in FIG. 6 toward the conveyor belt 362 by means of a drive motor not shown in the figures to change the thickness of the mineral fiber web 358 compared to the thickness of the mineral fiber web 360.

In its extreme position, the separation assembly prevents the separation of the mineral fiber web 70 into the mineral fiber webs 358 and 360, since the mineral fiber web 70 'as a whole is forced to contact the sandwich conveyor belts 362 and 364.

In FIG. 7 shows an alternative technique of folding a mineral fiber insulating web in the transverse direction of the mineral fiber insulating web. In FIG. 7, the mineral fiber insulating web 50 may form the output mineral fiber insulating web 50 ' shown in FIG. 3a or, alternatively, a mineral fiber insulating web 50 produced at the location shown in FIG. 2. The mineral fiber insulating web 50 is folded transversely when the mineral fiber insulating web 50 emerges from two sandwich conveyor belts 120 'and 120 ¹¹ and folded by means of continuously operating drive arms 126 ¹ and 126' ¹ , which are occasionally brought into contact Since one of the drive arms 126 'and 126 ¹ ' keeps the folded mineral fiber insulating web in position in the two sandwich conveyor belts 122 ¹ and 122 * ¹ , the other driven arm is brought into contact with the nonwoven surface. 50 and folds the web 50 transversely with respect to the longitudinal direction of the web, 50. The actuator arms 126 ¹ and 126 '' are supported on articulate arms 128 *, 129 'and 128'', 129 ^{1 1,} wherein the articulated arms 128', 129 ¹ and 128 ^{1 1,} 129 '' are moved by means of driven rollers 130 ¹ and 130 ¹ *. The transversely folded mineral fiber insulating web produced by the manufacturing site shown in FIG. 5 and protruding from the sandwich conveyor belts 122 'and 122''is designated 50 ¹ '.

In FIG. 7, a roll 144 'from which a film 146' is applied to the upper side of the web surface 50 by means of a roller 148 'before folding the web 50 as described above is further shown. Two additional rolls 144 ¹¹ and 144 ¹¹ 'are provided for supplying the film 146''and 146 ¹¹¹ to the top and bottom of the surface of the transversely folded mineral fiber insulating web 50 ¹¹ . The sheets 146 ¹ and 146 ¹¹¹ are pressed against the upper and lower surfaces of the transversely folded web 50 '' by rollers 148 ' ¹ and 148' ¹¹ . It should be appreciated that the foils 146 ¹ , 146 ' ¹ and 146 ¹ ''are optional features that can be omitted if, in accordance with a preferred embodiment of the cross-folding technique of a mineral fiber web 50, a cross-folded insulating web 50 is produced. mineral fiber without any other material except mineral fibers and a heat curable binder.

In FIG. 9 is a vertical view of a corrugated and transversely folded mineral fiber insulation web 50 ^& apos ;. The corrugated and transversely folded mineral fiber insulating web 50 '* comprises a central core or body 28 and two opposing surface layers 24 and 26, wherein the surface layers 24 and 26 are separated from the central core or body 28 of the corrugated and transversely folded insulating web 50 ¹¹ mineral fiber web along the imaginary line of separation 20 and 22. the surface layers 24 and 26 of the corrugated and cross-insulating web 50 ^one of the mineral fibers are composed of segments of the mineral fiber, which segments contain mineral fibers which are orientated substantially longitudinally with respect to the longitudinal direction of the corrugated and transversally folded web 50 of insulating mineral fiber ^11. The corrugated and transversely folded mineral fiber insulating web 50 ' ¹ is made of the primary mineral fiber insulating web 50 shown in FIG. 2 as described in connection with FIG. 5, optionally after compacting the primary mineral fiber insulating web 50 as described in connection with FIG. 3, i.e. made of the densified mineral fiber insulating web 50 ¹¹¹ shown in FIG. 3 and the predominant mineral fiber orientation of the primary mineral fiber insulating web 50 is subsequently maintained in the corrugated and cross-folded mineral fiber insulating webs 50, ¹¹ , wherein these segments together they form the surface layers 24 and 26.

The central body or core 28 of the corrugated and transversely folded mineral fiber insulating web 50 ¹¹ is composed of a segment of pleated mineral fiber insulating web 50 ', wherein these segments are folded perpendicular to the segments of the topsheet 24 and 26 of mineral fiber insulating web 50 ¹ . The mineral fibers of the central body or core 28 of the corrugated and transversely folded mineral fiber insulating web 50 ¹¹ are consequently oriented substantially perpendicular to the longitudinal direction as well as the transverse direction of the corrugated and transversely folded mineral fiber insulating web 50 ¹¹ .

The corrugated and transversely folded mineral fiber insulation web 50 ¹¹ shown in FIG. 9 and manufactured in accordance with the technique discussed above with respect to FIG. 7 is further processed at the location shown in FIG. 8, wherein the surface layers 24 and 26 are separated from the upper and lower surfaces of the central core or body 28 of the corrugated and transversely folded mineral fiber insulating web 50 ¹¹ along the imaginary dividing lines 20 and 22 shown in FIG. 9. Separation of the surface layers 24 and 26 from the remaining portions of the mineral fiber insulating web is performed by cutting tools 174 and 274, as the remaining portion of the mineral fiber insulating web is carried and conveyed by a conveyor belt 170. The cutting tools 174 and 274 may be formed stationary cutting tools or knives or alternatively may be formed by transverse retractable cutting tools. The surface layers 24 and 26 separated from the mineral fiber insulating web are separated from the travel path of the remaining portion of the mineral fiber insulating web by means of conveyor belts 172 and 272 and are conveyed from conveyor belts 172 and 272 to corresponding roller sets containing each first set of rollers 176 ¹ , 178 ¹ and 276 ¹ , 278 ¹ , second set of rollers 176 ' ¹ , 178 ¹¹ and 276' ¹ , 278 ^{1 1} and third set of rollers 167 ¹¹ ', 178 ^{1 1 1} and 276 ^{1 1 1} , 278 ^{1 1} * . As shown in FIG. 8, the surface layer 26 extends from the belt 272 around the rotating roller 278 before the surface layer 26 is contacted with the three sets of rollers 276 ¹ and 278 ¹ , 276 ¹ 'and 278 ¹ ' and 276 ^'11 and 278' ^{11 respectively} . Preferably, each of the three roller sets together forms a compaction section similar to the second section of the site described above with reference to FIG. 3a, comprising three sets of rollers 56 ¹ and 58 ¹ , 56 ¹ 'and 58 ¹ ' and 56 ' ¹ and 58' ^{11 respectively} . Using the above roller sets, the surface layers 24 and 26, as can be seen in FIG. 8, compacted to compacted surface layers 24 * and 26 '. Then, the compacted surface layers 24 and 26 are returned to the remaining portion of the mineral fiber insulating web comprising the central core or body 28 shown in FIG.

and connected in face contact with the upper and lower surfaces of the central core or body 28. In FIG. 8, the first set of rollers comprises a roller 178 ¹¹¹¹ and a roller 182 disposed on the upper and lower sides of the surface of the compacted surface layer 24 ¹ to form a rotating roller and a pressure roller. The roller 182 serves to compress the compacted surface layer 24 ^l in face contact with the top surface layer of the central core or body 28, which is supported and conveyed by a conveyor belt 70, as also shown in FIG. The second set of rollers comprises rollers 278 '''and 282. similar to the rollers 178 ¹ * ¹ 'and 182 and serve to guide and repeatedly compress the compacted surface layer 26 ¹ in face contact with the underside of the central core or body 28. After the compacted surface layers 24 ¹ and 26 ^{1 have been} brought into face contact with the upper side of the surface and the underside of the surface of the central core or body 28, a mineral fiber insulating nonwoven assembly is obtained, the assembly being denoted by 50 ^{1 1 1} 'as a whole. The assembly 50 ¹¹¹¹ comprises a central core or body of low density and surface layers 24 'and 26' of higher density.

In FIG. 8, reference numerals 247 'and 247 ^{11 indicate} any films present, which are located at the interface between the upper and lower compacted layers 24 ¹ and 26', and the central core or body 28. Two sets of rollers 244 ¹ and 244 ¹¹ are also shown in FIG. . 8 and these rollers form rollers similar to the rollers 144 '' and 144 '* ¹ shown in FIG. 7. Of the rollers 244 ¹ and 244 ^{1 1} , the films 246 ¹ and 246 ^{11 are} applied to the lower and upper surfaces of the assembly 50 ¹¹¹¹ and pressed against the upper and lower surfaces by means of the pressure rollers 248 ¹ and 248 ¹¹ .

In FIG. 10 is a fragmentary and perspective view of the plate segment 10 & apos ^; . The plate segment 10 ¹ comprises a central core 12 ¹ and an upper layer 14 '. Reference numeral 16 ¹ denotes the core segment 12 'of the plate segment 10 *, wherein the segment 16 * is made of one of the segments of the central core or body 12 of the corrugated and transversely folded mineral fiber insulating web 50 ¹¹ shown in Fig. 5.

In FIG. 11 shows a further embodiment of a segment of mineral fiber board, which is generally designated 340. Segment 340 is comprised of a central core or body 344 and a topsheet 342. The topsheet 342 is substantially similar in structure to the topsheet 14 ^1. shown in FIG. 10 of the mineral fiber composite plate 10 ¹ shown in FIG. 10. The central core 344 of the mineral fiber plate segment 340 is made of the composite mineral fiber web 382 described above with respect to FIG. 6 and includes a central fill designated by reference numeral 376 having greater compaction achieved by compacting and homogenizing the mineral fiber web 378 of the composite mineral fiber web 382. The section 376 may alternatively be made of a different base web, comprising mineral fibers arranged or positioned in any suitable orientation and any suitable density higher or lower than that of the remaining portion of the central core or body 344, the remaining portion being made of nonwoven 360 in accordance with with the teachings of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Example 1

The heat insulating board of a structure similar to that of FIG. 1, manufactured from a mineral fiber insulating web by the method of the present invention as described above with respect to FIG. 1-4, is manufactured according to the specifications below:

The method comprises steps similar to those described above with respect to FIG. 1, 2, 3c and 4. The production output of the device is 5,000 kg / h. The basis weight of the low density, low basis weight primary web produced at the location described in FIG. 1 is 0.4 kg / m ² . The width of the primary web produced at the location shown in FIG. 2 is 3,600 mm. The longitudinal compression ratio produced at the location described in FIG. 3c is 1: 2 and the transverse compression ratio produced at the location of FIG. 3c is 1: 2. The density of the central core or end plate body shown in FIG. 5b is 20 kg / m ³ . The final board comprises a single coating with a thickness of 10 mm and a density of 100 kg / m ³ . The longitudinal compression ratio of the coating is 1: 3 and the basis weight of the coating is 1 kg / m ³ . The width of the mineral fiber insulating web produced in FIG. 1 is 1800 mm.

The production parameters used are given in Tables A and B below:

Table A

Total thickness mm A m / minxlO B m / min C m / min D m / min E m / min F m / min 50 64.30 51.44 77.16 25.72 51.44 25.72 75 50,32 65.42 60.39 20.13 40.26 20.13 100 41.34 74,40 49,67 16.53 33.07 16.53 125 35.07 80.67 42.09 14.03 28,06 14.03 150 30.46 85,28 36.55 12.18 24.37 12.18 175 26.92 88.82 32. 30 10.77 21.53 10.77 200 24,11 91,63 28.94 9.65 19.29 9.65 225 21.84 93.90 26.21 8.74 17.47 8.74 250 19.96 95.79 23.95 7.98 15.96 7.98 275 18.37 97,37 22.05 7.35 14.70 7.35 A = number of the pendulum 104 B = belt speed 42, 62 '', 62 '' ', 100, 102, 104, 62, 64 ', 64 ''. 64 '' '. 66 'a 66' ' C = belt speed 106, 108. 118 '', 110 'a 110 '' D = belt speed 112 ', 112' ', 114' . 114 '' , 116, 78 ' and 76

E = belt speed 68 ¹ and 68 ¹¹

F = Velocity of belts 72 ^1, 72 ^'1 and 74 ¹¹

Table B

Total thickness mm G kg / m ² H kg / m ² I kg / m ² J kg / m ² K kg / m ³ L specif. 50 0.90 0.80 0.50 0.40 3.60 0.80 75 0.71 1.30 0.31 0.40 3.07 1.30 100 0.62 1.80 0.22 0.40 2.80 1.80 125 0.57 2.30 0.17 0.40 2.64 2.30 150 0.54 2.80 0.14 0.40 2.53 2.80 175 0.52 3.30 0.12 0.40 2.46 3.30 200 0.51 3.80 0.11 0.40 2.40 3.80 225 0.49 4.30 0.09 0.40 2.36 4.30 250 0.48 4.80 0.08 0.40 2.32 4.80 275 0.48 5.30 0.08 0.40 2.29 5.30

G = basis weight of mineral fiber insulating web on belt 42

H = basis weight of the central core or body after composition I = basis weight of the surface layer

J = basis weight of central core or body before transverse folding

K = average density

L = ratio between the central core or body and the surface layer

In FIG. 12 is a diagram illustrating the relationship between the parameters shown in Table A. The labels used in FIG.

correspond to the parameter designations in Table A.

In FIG. 13 is a diagram illustrating the relationship between the parameters shown in Table B. The labels used in FIG.

correspond to the parameter designations in Table B.

Example 2

A composite roofing sheet manufactured in accordance with the method of the present invention, referring to FIG. 1 to 4 is produced according to the following data:

The method comprises steps similar to those described above in FIG. 1, 2, 3c and 4. The production output of the device is 5,000 kg / h. The width of the primary web produced at the location described in FIG. 2 is 3,600 mm. The basis weight of the primary web produced at the location described in FIG. 1 is 0.6 kg / m ² . The longitudinal compression ratio produced at the location described in FIG. 3c is 1: 2 and the transverse compression ratio produced at the location of FIG. 3c is 1: 2. The density of the central core or end plate body described in FIG. 5b is 110 kg / m ³ . The final board comprises a single coating having a thickness of 17 mm and a density of 210 kg / m. The longitudinal compression ratio of the layer is 1: 3 and the basis weight of the surface layer is 3.57 kg / m ² . The width of the mineral fiber insulating web produced in FIG. 1 is 1800 mm.

The production parameters used are given in Tables C and D below:

Table C

total A B C D E F thickness mm r / minxlO m / min m / min m / min m / min m / min 50 58,94 38.90 19.29 6.43 12.86 6.43 75 42.65 49.48 13.96 4.64 9.31 4.65 100 33.42 55.47 10.94 3.65 7.29 3.65 125 27.47 59.33 8.99 3.00 5.99 3.00 150 23.32 62,03 7.63 2.54 5.09 2.54 175 20.26 64.01 6.63 2.21 4.42 2.21 200 17.91 65.54 5.86 1.95 3.91 1.95 225 16.04 66.75 5.25 1.75 3.50 1.75 250 14.53 67.73 4.76 1.59 3.17 1.59 275 13.28 68,54 4.35 1.45 2.90 1.45

A = number of pendulum strokes 104

B = belt speed 42, 62 ¹ *, 62 ' ¹ ', 100, 102, 104, 62, 64 ',

64 ^{1 1} , 64 ' ^{1 1} , 66' and 66 ''

C = belt speed 106, 108, 118 ' ¹ , 110 ¹ and 110''

D = belt speed 112 ¹ , 112 ''. 114 ¹ , 114 ¹ ', 116, 78 ¹ and 76

E = belt speed 68 ¹ and 68 ¹¹

F = belt speed 72 ¹ , 72 ¹ * and 74 ^{1 1}

Table D

Total thickness mm G kg / m ² H kg / m ² I kg / m ² J kg / m ² K kg / m ³ L specif. 50 1.19 3.63 0.59 0.60 14.40 1.02 75 0.94 6.38 0.34 0.60 13.27 1.79 100 0.83 9.13 0.23 0.60 12.70 2.56 125 0.78 11.88 0.18 0.60 12.36 3.33 150 0.75 14.63 0.15 0.60 12,13 4.10 175 0.72 17.38 0.12 0.60 11.97 4.87 200 0.71 20.13 0.11 0.60 11.85 5.64 225 0.69 22.88 0.09 0.60 11.76 6.41 250 0.68 25.63 0.08 0.60 11.68 7.18 275 0.68 28.38 0.08 0.60 11.62 7.95

G = basis weight of mineral fiber insulating web on belt 42

H = basis weight of the central core or body after composition I = basis weight of the surface layer

J = basis weight of central core or body before transverse folding

K = average density

L = ratio between the central core or body and the surface layer

In FIG. 14 is a diagram similar to FIG.

12 illustrating the relationship between the parameters shown in the table

C.

In FIG. 15 is a diagram similar to FIG.

13 illustrating the relationship between the parameters shown in the table

D.

Example 3

A composite roofing sheet manufactured in accordance with the method of the present invention, referring to FIG. 1 to 4 is produced according to the following data:

The method comprises steps similar to those described above in FIG. 1, 2, 3c and 4. The production output of the device is 5,000 kg / h.

The width of the primary web produced at the location described in FIG. 2 is 1800 mm. The basis weight of the low-compact, low basis weight web produced at the location described in FIG. 1 is 0.6 kg / m ² . The longitudinal compression ratio produced at the location described in FIG. 3c is 1: 2 and the transverse compression ratio produced at the location of FIG. 3c is 1: 2. The density of the central core or end plate body described in FIG. 5b is about

110 kg / m. The final board contains a single coating with a thickness of 17 mm and a density of 210 kg / m ³ . The longitudinal compression ratio of the layer is 1: 3 and the basis weight of the surface layer is n

3.57 kg / m. The width of the mineral fiber insulating web produced in FIG. 1 is 900 mm.

The manufacturing parameters used are given in Tables E and F below:

Table E

total A B C D E F thickness mm r / minxlO m / min m / min m / min m / min m / min 50 58,94 38.90 38.58 12.86 12.86 12.86 75 42.65 49.48 27.92 9.31 9.31 9.31 100 33.42 55.47 21.87 7.29 7.29 7.29 125 27.47 59.33 17.98 5.99 5.99 5.99 150 23.32 62,03 15.26 5.09 5.09 5.09 175 20.26 64.09 13.26 4.42 4.42 4.42 200 17.91 65.54 11.72 3.91 3.91 3.91 225 16.04 66.75 10.50 3.50 3.50 3.50 250 14.53 67.73 9.51 3.17 3.17 3.17 275 13.28 68,54 8.69 2.90 2.90 2.90

A = number of pendulum strokes 104

B = belt speed 42, 62 ^L , 62 ^L , 100, 102, 104, 62, 64 ^L , 64 ^L , 66 ^L and 66

C = belt speed 106, 108, 118 ¹ ', 110 * and 110' ¹

D = belt speed 112 ¹ . 112 ¹ ', 114 ¹ , 114 ¹¹ , 116, 78' and 76

E = belt speed 68 ¹ and 68 ¹ '

F = belt speed 72 ', 72' ¹ and 74 ¹¹

Table F

total G H I J The L thickness mm kg / m ² kg / m ² kg / m ² kg / m ² kg / m ³ specif. 50 11.90 3.63 5.90 6.00 14.40 1.02 75 9.36 6.38 3.36 6.00 13.27 1.79 100 8.35 9.13 2.35 6.00 12.70 2.56 125 7.80 11.88 1.80 6.00 12.36 3.33 150 7.46 14.63 1.46 6.00 12,13 4.10 175 7,23 17.38 1.23 6.00 11.97 4.87 200 7.06 20.13 1.06 6.00 11.85 5.64 225 6.94 22.88 0.94 6.00 11.76 6.41 250 6.84 25.63 0.84 6.00 11.68 7.18 275 6.75 28.38 0.75 6.00 11.62 7.95

G = basis weight of mineral fiber insulating web on belt 42

H = basis weight of the central core or body after composition I = basis weight of the surface layer

J = basis weight of central core or body before transverse folding

K = average density

L = ratio between the central core or body and the surface layer

In FIG. 16 is a diagram similar to FIG.

12 illustrating the relationship between the parameters shown in the table

E.

In FIG. 17 is a diagram similar to FIG.

13 illustrating the relationship between the parameters shown in the table

F.

Example 4

A composite roofing sheet manufactured in accordance with the method of the present invention, referring to FIG. 1 to 4 is produced according to the following data:

The method comprises steps similar to those described above in FIG. 1, 2, 3c and 4. The production output of the device is 5,000 kg / h. The width of the primary web produced at the location described in FIG. 2 is 3,600 mm. The basis weight of the low-compact, low basis weight web produced at the location described in FIG. 1 is 0.6 kg / m ² . The longitudinal compression ratio produced at the location described in FIG. 3c is 1: 2 and the transverse compression ratio produced at the location of FIG. 3c is 1: 2. The density of the central core or end plate body described in FIG. 5b is 110 kg / m. The final board contains a single coating with a thickness of 17 mm and a density of 210 kg / m ³ . The longitudinal compression ratio of the layer is 1: 3 and the basis weight of the surface layer is 3.57 kg / m. The width of the mineral fiber insulating web produced in FIG. 1 is 1800 mm.

The manufacturing parameters used are given in Tables G and H below:

Table G

total A B C D E F thickness mm r / minxlO m / min m / min m / min m / min m / min 50 29.47 19.45 19.29 6.43 6.43 6.43 75 21,33 24.74 13.96 4.65 4.65 4.65 100 16.71 27.74 10.94 3.65 3.65 3.65 125 13.73 29.67 8.99 3.00 3.00 3.00 150 11.66 31,01 7.63 2.54 2.54 2.54 175 10.13 32.01 6.63 2.21 2.21 2.21 200 8.95 32.77 5.86 1.95 1.95 1.95 225 8.02 33.37 5.25 1.75 1.75 1.75 250 7.27 33.86 4.76 1.59 1.59 1.59 275 6.64 34.27 4.35 1.45 1.45 1.45

A = number of pendulum strokes 104

B = belt speed 42, 62 '', 62 ' ¹ ', 100, 102, 104, 62, 64 ¹ ,

64 '', 64 ¹¹¹ , 66 'and 66 ¹¹

C = Velocity of belts 106, 108, 118 ^{1 1,} 110 * and 110 ^'1

D = belt speed 112 ', 112'',114', 114 ¹ ', 116, 78' and 76

E = belt speed 68 ¹ and 68 ¹ '

F = belt speed 72 ^l , 72 ^{l 1} and 74 ^{l 1}

Table H

Total thickness mm G kg / m ² H kg / m ² I kg / m ² J kg / m ² K kg / m ³ L specif. 50 11.90 3.63 5.90 6.00 14.40 1.02 75 9.36 6.38 3.36 6.00 13.27 1.79 100 8.35 9.13 2.35 6.00 12.70 2.56 125 7.80 11.88 1.80 6.00 12.36 3.33 150 7.46 14.63 1.46 6.00 12,13 4.10 175 7,23 17.38 1.23 6.00 11.97 4.87 200 7.06 20.13 1.06 6.00 11.85 5.64 225 6.94 22.88 0.94 6.00 11.76 6.41 250 6.84 25.63 0.84 6.00 11.68 7.18 275 6.75 28.38 0.75 6.00 11.62 7.95

G = basis weight of mineral fiber insulating web on belt 42

H = basis weight of the central core or body after composition I = basis weight of the surface layer

J = basis weight of central core or body before transverse folding

K - average density

L = ratio between the central core or body and the surface layer

In FIG. 18 is a diagram similar to FIG.

12 illustrating the relationship between the parameters shown in the table

G.

In FIG. 19 is a diagram similar to FIG.

13 illustrating the relationship between the parameters shown in the table

H.

The importance of subjecting the mineral fiber insulating web to longitudinal and transverse compression is illustrated by the data given in Table I below:

Table I

M N 0 Thermo-insulating Compressive strength: 2 kPa 7 kPa 9 kPa board of goose- 30 kg / m ³ Elasticity modulus: 15 kPa 125 kPa 150 kPa Roof insulation- Compressive strength: 70 kPa 180 kPa 210 kPa board of goose- 150 kg / m ³ Elasticity modulus: 600 kPa 3300 kPa 4000 kPa

M - conventional mineral fiber insulation boards

N - mineral fiber insulating boards produced according to the invention, not subjected to longitudinal / transverse compression

O-mineral fiber insulation boards produced according to the invention, subjected to longitudinal / transverse compression

Claims (45)

PATENT CLAIMS 1. A method for producing a mineral fiber insulating web, comprising the steps of: (a) manufacturing a first non-woven mineral fiber web defined by a first longitudinal direction parallel to the mineral fiber web and a second transverse direction parallel to the first mineral fiber web, wherein the first mineral fiber web comprises mineral fibers arranged generally in the first transverse direction and comprises the first a thermosetting binder, wherein the first mineral fiber web is a loosely compacted mineral fiber web having a basis weight, such as a basis weight of 50-1,500 g / m ² , e.g. 100-1,200 g / m 2, such as 200-600 g / m ² , or 600-1,200 g / m ² , b) moving the first mineral fiber web in the first longitudinal direction of the first mineral fiber web, c) folding the first mineral fiber web across the first longitudinal direction and parallel to the second transverse direction so as to obtain a second non-woven mineral fiber web, wherein the second mineral fiber web comprises a central body comprising mineral fibers arranged generally perpendicular to the first longitudinal direction the direction and the second transverse direction, d) movement of the second mineral fiber web in the first longitudinal direction, e) curing said first curable agent to thereby bond said mineral fibers of said second mineral fiber web to each other 8 q q.-q r 54 to form said mineral fiber insulating web. The method of claim 1, further comprising the further step of height compressing said first non-woven mineral fiber web produced in step a). The method according to any one of claims 1 or 2, further comprising the further step of longitudinally compressing said first non-woven mineral fiber web produced in step a). The method of any one of claims 1 to 3, further comprising the further step of longitudinally compressing said second non-woven mineral fiber web produced in step c). The method of any one of claims 1 to 4, comprising the further step of transversally compressing the second non-woven mineral fiber web produced in step c). Method according to any one of claims 1 to 5, characterized in that said folding in step c) comprises a step of preparing a ripple arranged perpendicular to the first longitudinal direction and parallel to said second transverse direction. The method of any one of claims 1 to 6, further comprising the following replacement steps - 55 degree e) f) producing a third non-woven mineral fiber web defining a third direction parallel to said third mineral fiber web, wherein said third mineral fiber web is generally arranged in said third direction and comprises a second curable agent, wherein said mineral fiber web is a nonwoven high density mineral fiber compared to said second mineral fiber web, (g) combining said third mineral fiber web with said second mineral fiber web in their face contact to produce a fourth composite mineral fiber web; and h) curing said first and second curable agents causing said mineral fibers of said fourth composite mineral fiber web to bind to each other, thereby forming said mineral fiber insulating web. The method of claim 7, wherein said third non-woven mineral fiber web is produced by separating a surface segment of the layer of said first mineral fiber web and compacting said surface segment of the layer to produce said third mineral fiber web. 9. The method of claim 8, wherein said compacting of said surface segment of the layer comprises the step of folding said surface segment of the layer to form said third mineral fiber web comprising mineral fibers generally arranged in an o- 56 to orient transversely with respect to the longitudinal direction of said third mineral fiber web. Method according to any one of claims 7 to 9, characterized in that it comprises a further step similar to step f) for producing a fifth non-woven mineral fiber web similar to said third mineral fiber web and a bonding step in step g) of said fifth mineral fiber web and wherein said second mineral fiber web is sandwiched between said third and fifth mineral fiber webs in said fourth mineral fiber web. Method according to any one of claims 7 to 10, characterized in that said third direction is perpendicular to said first longitudinal direction. Method according to any one of claims 7 to 10, characterized in that said third direction coincides with said first longitudinal direction. The method of any one of claims 1 to 12, comprising the further step of compressing said fourth composite mineral fiber web before curing said fourth composite mineral fiber web. Method according to any one of claims 1 to 13, characterized in that it comprises the following steps before step c): (i) manufacturing a sixth non-woven mineral fiber web defining a fourth longitudinal direction parallel to said sixth mineral fiber web, wherein said sixth mineral fiber web comprises mineral fibers and comprises a third curable binder, wherein said sixth mineral fiber web is a non-woven mineral fiber web mineral composites of higher compaction compared to said first mineral fiber web; and j) attaching said sixth mineral fiber web to said first mineral fiber web produced in step a) in their face contact, prior to step c) to produce a seventh composite mineral fiber web composed in step c) to form said second mineral fiber web and the step e) also comprises curing said third curable binder agent. 15. The method of claim 14 wherein said sixth mineral fiber web is produced by separating a separate layer of said first mineral fiber web and compacting said separate layer to form said sixth mineral fiber web. 16. The method of claim 15, wherein said compacting of said separate layer comprises a step of folding said separate layer. The method of any one of claims 1 to 16, further comprising the step of applying a coating to the surface or both surfaces of said first non-woven mineral fiber web. The method of any one of claims 1 to 17, further comprising the step of applying a coating to the surface or both surfaces of said second non-woven mineral fiber web. The method of any one of claims 10 to 18, further comprising the step of applying a coating to or both surfaces of said fourth non-woven mineral fiber web. Method according to any one of claims 1 to 19, characterized in that said curing is carried out by means of a curing oven. The method of any one of claims 1 to 20, further comprising the step of cutting said cured mineral fiber web into plate segments. An apparatus for producing a mineral fiber insulating web comprising (a) first means for producing a first non-woven mineral fiber web defining a first longitudinal direction parallel to the mineral fiber web and a second transverse direction parallel to the first mineral fiber web, wherein the first mineral fiber web is made to include mineral fibers arranged generally in the second transverse direction and comprising a first curable agent, the first mineral fiber web is a non-compacted mineral fiber web of low basis weight, such as a basis weight of 50 to 1500 g / m ² e.g. 100-1,200 g / m ² , such as 200-600 g / m ² or 600-1,200 g / m ² , 89 pts -TC ' b) second means for moving the first mineral fiber web in the first longitudinal direction of the first mineral fiber web; c) third means for folding the first mineral fiber web transversely to the first longitudinal direction and parallel to the second transverse direction to form a second non-woven mineral fiber web comprising a central body comprised of mineral fibers arranged substantially perpendicular to the first longitudinal direction and the second transverse direction . d) fourth means for moving the second mineral fiber web in the first longitudinal direction; e) a fifth means for introducing a second non-woven mineral fiber web into a curing oven for curing the first curable agent so as to cause the mineral fiber web, the mineral fiber, to bind together. the mineral fibers of the second thereby forming an insulating web 23. The apparatus of claim 22, comprising six means further comprising, for height compression of said first non-woven mineral fiber web produced by said first means. The apparatus of any one of claims 22 or 23, further comprising seventh means for longitudinally compressing said first non-woven mineral fiber web produced by said first means. The apparatus of any one of claims 22 to 24, further comprising eight means for longitudinally compressing said second non-woven mineral fiber web oriented by said third means. The apparatus of any one of claims 22 to 25, further comprising ninth means for laterally compressing said second non-woven mineral fiber web produced by said third means. A device according to any one of claims 22 to 26, characterized in that it is adapted to fold said first mineral fiber web produced by said first means so as to form a ripple extending perpendicular to said first longitudinal direction and parallel to said second transverse direction . The apparatus of any one of claims 22 to 27, further comprising f) a tenth means for producing a third non-woven mineral fiber web defining a third direction parallel to said third mineral fiber web, wherein said third mineral fiber web is produced such that it comprises mineral fibers arranged predominantly in said third direction and comprises a second curable a binder agent, wherein said third mineral fiber web is a higher density mineral fiber web compared to said second mineral fiber web, nj'W-qr (g) eleventh means for joining said third mineral fiber web to said second mineral fiber web in face contact therewith to produce a fourth composite mineral fiber web; and h) said fifth means is adapted to cure said first and second binder agents so as to induce said mineral fibers to bind said fourth composite material together to form said mineral fiber insulating web. 29. The apparatus of claim 28, wherein said tenth means is adapted to produce said third non-woven mineral fiber web by separating a surface segment of said first mineral fiber web and compacting said surface segment layer to produce said third mineral fiber web. fibers. 30. The apparatus of claim 29, wherein said tenth means is adapted to compact said surface layer segment by folding said surface layer segment to produce said third mineral fiber web comprising mineral fibers arranged predominantly transverse to in the longitudinal direction of said third mineral fiber web. An apparatus according to any one of claims 28 to 30, comprising twelve means similar to the tenth means for producing a fifth nonwoven mineral fiber web similar to a third mineral fiber web and thirteenth means for bonding said fifth mineral fiber web to said second mineral fiber web. ΓΜ -9Γ 62 mineral fiber webs in their face-to-face contact and sandwiching said second mineral fiber web between said third and fifth mineral fiber webs in said fourth mineral fiber web. The apparatus of any one of claims 20 to 31, wherein said third direction is perpendicular to said first longitudinal direction. The device according to any one of claims 28 to 32, wherein said third direction coincides with said first longitudinal direction. The apparatus of any one of claims 22 to 33, further comprising fourteenth means for compressing said fourth composite mineral fiber web prior to introducing said fourth composite mineral fiber web into said curing oven. 35. The apparatus of any one of claims 22 to 34, further comprising the following means prior to said third means: (i) fifteen means for producing a sixth non-woven mineral fiber web defining a fourth longitudinal direction parallel to said sixth mineral fiber web, said sixth mineral fiber web comprising mineral fibers and a third curable binder, and said sixth mineral fiber web being a nonwoven Mineral fibers of higher density - <? Γ 63 compared to the first mineral fiber web, and j) sixteen means for joining said sixth mineral fiber web with said first mineral fiber web produced by said first compositions in their face-to-face contact, prior to folding said first mineral fiber web by said third means, to produce a seventh composite mineral fiber web which is composed by said third means to produce said second mineral fiber web and said fifth means are also adapted to cure said third curable binder agent. 36. The apparatus of claim 35, wherein said sixth mineral fiber web is produced by eighteen means for separating a separate layer from said first mineral fiber web and compacting said separate layer for producing said sixth mineral fiber web. 37. The apparatus of claim 36, wherein said compacting of said separate layer is accomplished by nineteen means for folding said separate layer. 38. The apparatus of any one of claims 22 to 37, further comprising twenty means for applying a coating to the surface or both surfaces of said first non-woven mineral fiber web. 39. The apparatus of any one of claims 22 to 38, further comprising twenty-first means for applying a coating to the surface or both surfaces of said second non-woven mineral fiber web. 40. The apparatus of any one of claims 31 to 39, further comprising twenty-second means for applying a coating to the surface or both surfaces of said fourth non-woven mineral fiber web. 41. The apparatus of any one of claims 22 to 40, wherein said fifth means comprises a curing oven. 42. The apparatus of any one of claims 22 to 41, further comprising twenty-third means for cutting said cured non-woven mineral fiber web into plate segments. 43. Mineral fiber insulation board defining a longitudinal direction and comprising: a central body comprising mineral fibers, a surface layer comprising mineral fibers, a central body and a surface layer interconnected in face contact, said mineral fibers of the central body being arranged generally perpendicular to the longitudinal direction and perpendicular to the surface layer, said mineral fibers of said surface layer are arranged generally in a direction parallel to the longitudinal direction, said central body surface layer and said mineral fibers and said mineral fibers together bonded to integral bonding agents at one origin present in the uncured, mineral fibers from which the topsheet is made. is more compact compared to said central body of said surface layer, the structures are only by curing the curing process and on nonwoven webs from a micentral body and 44. The mineral fiber insulating board of claim 43, comprising opposing surface layers of a similar structure sandwiching the central body into said integral structure. Mineral fiber insulating board according to any one of claims 43 to 44, characterized in that said central body comprises lamellas arranged generally perpendicular to said longitudinal direction and interconnected by mineral fiber layers of higher mineral fiber density compared to said lamellas. A mineral fiber insulating board according to claims 42 to 45 43, characterized in that it is produced by a method according to any one of claims 1 to 21 and / or by means of a device according to any one of claims 22 to 42.